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Australia
Forrestania Operation (Flying Fox Mine, Spotted Quoll Mine)

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 Location:
369 km E from Perth, Western Australia, Australia

  Address:
Suite 4, Level 5 South Shore Centre 85 South Perth Esplanade
Perth
Western Australia, Australia
6151
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Fax+61-8-9238-8399
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
Mining Method
  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life2025
The Forrestania Operation includes two underground mines, Flying Fox and Spotted Quoll, and the Cosmic Boy processing facility.


Owners

Source: p. 70
CompanyInterestOwnership
IGO Ltd. 100 % Indirect
On 20 June 2022, IGO Limited acquired 100% of the issued capital of Western Areas Limited (Western Areas). Western Areas was an ASX listed Australian-based mining and exploration company with a portfolio of operating and development stage mines. It owns a 100% interest in the Forrestania Operation (consisting of the Flying Fox and Spotted Quoll underground mines and the Cosmic Boy processing facility) and the Cosmos Project, both located in Western Australia, together with a substantial exploration portfolio.

Contractors

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Deposit Type

  • VMS


Summary:

Forrestania’s camp of nickel sulphide deposits is hosted by a sequence of ~2.9Ga meta-igneous and metasedimentary rocks that are part of the Forrestania Greenstone Belt (FGB) of the Youanmi Terrane of the Eastern Yilgarn Craton.

Forrestania’s nickel deposits is the ‘Kambalda-style’ Type 1 and Type 2 models where nickel sulphides are interpreted to have accumulated in channelised komatiitic lava flows. Many of Forrestania’s deposits are often tectonically displaced from the original depositional locations and have been deformed and/or dismembered by one or more local and/or regional post-depositional tectonic events.

The main deposit type is the komatiite hosted, disseminated to massive nickel sulphide deposits, which include the Flying Fox and Spotted Quoll deposits. The mineralisation occurs in association with the basal section of high MgO cumulate ultramafic rocks.

The greenstone succession in the district also hosts several orogenic lode gold deposits, of which the Bounty Gold Mine is the largest example.


Mining Methods

  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill


Summary:

Flying Fox is Western Areas first producing underground mine and remains one of the highest grade nickel mines in the world. Production commenced in 2006, and the underground mine now operates at depths of over 1km underground.

The Flying Fox orebody extends from 250m to 1.2km below the surface and includes discrete independent orebodies with possible extensions at depth. The primary stoping method used is ‘top- down’ long-hole stoping using paste-fill to attempt 100% recovery of the high-grade orebody. In the narrower sections of the orebody both modified Avoca with unconsolidated and cemented rock-fill are used.

The Spotted Quoll orebody is open at depth with the mine currently planned to just over 1km below the surface. The primary stoping method is a ‘top-down’ mining method using long-hole open stoping with paste fill. The narrower and shallower areas are mined using top-down narrow vein techniques.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits20222020201920182017
Nickel t  ......  Subscription required  ......  Subscription required  ......  Subscription required21,06023,005
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
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Operational Metrics:

Metrics20212020201920182017
Annual production capacity  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required556,002 t607,120 t591,778 t
Tonnes milled  ......  Subscription required  ......  Subscription required610,487 t616,598 t617,808 t
Annual processing capacity  ......  Subscription required  ......  Subscription required550,000 t550,000 t
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Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Probable 2.89 Mt Nickel 1.92 % 56 kt
Indicated 9.19 Mt Nickel 1.43 % 175 kt
Inferred 3.25 Mt Nickel 1.26 % 48 kt
Total Resource 12.45 Mt Nickel 1.79 % 223 kt

Commodity Production Costs:

CommodityUnits2020201920182017
Credits (by-product) Nickel AUD  ......  Subscription required  ......  Subscription required -0.03 / lb   -0.03 / lb  
Cash costs Nickel AUD  ......  Subscription required†  ......  Subscription required† 2.63 / lb†   2.38 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units20232020201920182017
Capital expenditures (planned) M AUD  ......  Subscription required
Revenue M AUD  ......  Subscription required  ......  Subscription required 248.3   213.9  
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required 17.2   17.4  
After-tax Income M AUD  ......  Subscription required  ......  Subscription required 11.8   19.3  
EBIT M AUD  ......  Subscription required  ......  Subscription required 18.5   18.6  
EBITDA M AUD  ......  Subscription required  ......  Subscription required 248.3   84.9  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Sustainability Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Year-end Mineral Reserves 2013
Other 2010
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